Here we are.Now, this may or may not be the original pedal for the Viper. It appears to use a different housing, and has a mysterious label on it that suggests that it is some kind of prototype. Strange, but this was the pedal that came with the Viper when I first got it; it works and does what it is supposed to. Is it a factory ADA prototype? Something that someone else came up with using leftover/spare parts? I have no answers on any of that. Here are the pics.

I have seen a couple that had the 4 switch buttons in a row, before. But don't recall for which models.

I had back in the day, a rack mount 4 effects unit, (TFX4 Chorus, flange, doubler, and echo) that had a TRS connection that I changed to an XLR. I once had set up for a gig, and it was on, unbeknownst to me... when I plugged in the footswitch. That took out a dozen chips...lol So changed the rack unit to XLR, to prevent the gross short out, again.I don't know what happened to that unit, or the footswitch.